7430
7430 8-Input NAND Gate IC Technical Summary
Overview
The 7430 is a monolithic quad two-input NAND gate integrated circuit belonging to the 7400 series of TTL logic devices. This 14-pin DIP package contains a single 8-input NAND gate that performs the Boolean function Y = NOT (A AND B AND C AND D AND E AND F AND G AND H). As part of the standard TTL family, it operates on a 5V power supply and is compatible with all TTL devices.
Originally developed by Texas Instruments in the 1960s, the 7430 remains widely used in digital logic design due to its reliable performance and standardized pinout. The device features standard propagation delay times and power dissipation characteristics typical of 74-series TTL logic.
Features
- Single 8-input NAND gate functionality
- Standard TTL switching voltages
- 14-pin dual in-line package (DIP)
- Wide operating voltage range: 4.75V to 5.25V
- Typical propagation delay: 22ns
- Fan-out of 10 standard TTL loads
- Operating temperature range: 0°C to 70°C
- Low power consumption: 10mW typical per gate
- Input clamp diodes for transient protection
Applications
The 7430 finds use in numerous digital logic applications including:
General Purpose Logic
Used as a fundamental building block in digital circuit design for implementing complex logic functions
Address Decoding
Employed in memory systems for address decoding where multiple conditions must be met simultaneously
Error Detection Circuits
Used in parity checkers and other error detection systems where multiple inputs need to be monitored
Control Logic
Implements control functions in microprocessor systems where multiple enable/disable conditions exist
Clock Gating
Can be used to gate clock signals based on multiple control inputs
Pin Configuration
Pin Description
- Pins 1-6, 11, 12 (A-H): Eight data inputs to the NAND gate
- Pin 7 (GND): Ground reference (0V)
- Pin 8 (Y): NAND gate output
- Pins 9, 10, 13 (NC): No connection (internal to package)
- Pin 14 (VCC): Positive supply voltage (+5V nominal)
Electrical Characteristics
Absolute Maximum Ratings
- Supply Voltage (VCC): -0.5V to +7V
- DC Input Voltage (VI): -0.5V to VCC + 0.5V
- DC Output Voltage (VO): -0.5V to VCC + 0.5V
- DC Input Diode Current (IIK): ±20mA
- DC Output Diode Current (IOK): ±20mA
- DC Output Current (IO): ±25mA
- DC Supply Current (ICC): 55mA
- Power Dissipation (PD): 500mW
- Storage Temperature Range (TSTG): -65°C to +150°C
Recommended Operating Conditions
- Supply Voltage (VCC): 4.75V to 5.25V
- High-Level Input Voltage (VIH): 2V min
- Low-Level Input Voltage (VIL): 0.8V max
- Operating Ambient Temperature (TA): 0°C to 70°C
DC Electrical Characteristics
- High-Level Output Voltage (VOH): 2.4V min (VCC = min, IOH = -400μA)
- Low-Level Output Voltage (VOL): 0.4V max (VCC = min, IOL = 16mA)
- Input Clamp Voltage (VIK): -1.5V max (VCC = min, II = -18mA)
- High-Level Input Current (IIH): 40μA max (VCC = max, VI = 2.4V)
- Low-Level Input Current (IIL): -1.6mA max (VCC = max, VI = 0.4V)
- Short-Circuit Output Current (IOS): -18mA to -55mA (VCC = max)
- Supply Current (ICC): 19mA max (VCC = max)
AC Electrical Characteristics
- Propagation Delay Time (tPLH): 15ns max (CL = 15pF, RL = 2kΩ)
- Propagation Delay Time (tPHL): 22ns max (CL = 15pF, RL = 2kΩ)
- Output Transition Time (tTLH): 15ns max (CL = 15pF, RL = 2kΩ)
- Output Transition Time (tTHL): 22ns max (CL = 15pF, RL = 2kΩ)
Package Information
Physical Dimensions
The 7430 is available in a standard 14-pin plastic dual in-line package (PDIP) with the following dimensions:
- Package Type: PDIP-14
- Length: 19.3mm max
- Width: 6.35mm max
- Height: 4.57mm max
- Lead Pitch: 2.54mm
- Lead Width: 0.38mm min
- Lead Length: 3.3mm min
Package Marking
The package is typically marked with the following information:
- Manufacturer's logo or identifier
- Part number (7430 or SN7430)
- Date code (week/year of manufacture)
- Country of origin
